07-04-2014 07:28 AM
I'm not sure I understand exactly what you're trying to do.
You can definitely create your own custom tab and add your own content (such as a Windows form etc).
A very basic example:
TabPage page = new TabPage("My Tab"); page.Controls.Add(MyForm); actApp.UILayoutDesignerManager.AddTabToCurrentLayout(page);
Could you provide some more information about what you're trying to achieve?